hg: build-infra/jdk8: Creating hooks for running stuff at the beginning or end of make. Initially

[magnus.ihse.bursie at oracle.com]

Changeset: ddeca591a0dc
Author:    ihse
Date:      2012-04-26 16:00 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/ddeca591a0dc

Creating hooks for running stuff at the beginning or end of make. Initially
adding some basic information.

! common/makefiles/MakeBase.gmk
! common/makefiles/Makefile